Blow-out patch for balloon tires



'1,631,354 c. E. AYERs BLOW-OUT PATCH FOR BALLOON TIRES June 7, 1927.

Filed Aug. 9, 1926 Chares Ayers,

w WQW` `Patented June 7, `1927.

UNITED STATES CHARLES E. AYElitS, OFLEVES, OHIO. n

BLOW-OUT PATCH FOR vBALLOON TIRES.'

Application med August 9,1926.l Serial No. 128,081.'

This invention relates to blow-out patches or boots forfusewith balloon type'tires and has for an object the provision ot such patch which Will effectively remain in position in a low pressure tire. f

Another object is to provide such patch or boot for the purpose stated, that may be 'selfvulcanizing to a tire during use.

These and other objects are attainedby the means ydescribed herein and disclosed .in n

fliexlbl'e in all directions does not offer a the accompanying drawings in which:

Fig. l is a topv plan vieu' of a patch of my invention, part being broken away.

Fig.. 2 isa cross-sectionalview on 244-2 of Fig. 1. L- Fig. 3 is an enlarged cross-sectional yiew on line 3 3 of Figfl"4 The patch or boot 7 of my invention comprises a built up structure designed to provide for thebroken or blown out portion of a low pressure tire a Wall structure having the same flexibility and smooth traction as the wall of the casing itself. The base 8 is of pure'fiexible rubber stock such as is used orinner tubes, and such base may be cut from discarded tubes. It may take practiline ` Acally any desired shape, however, a circular ing or .round base is found -very effective. Strips of uncuredv cord stock 9 such as is used in building tires -are then cut to lengths less than the vdiameter of the base and are laid across one another at various angles to provide a sutlic'ient number of plies of cord stock. Three strips are shown herein and provide a sufficient thickness for most purposes, although a greater number of plies may be used if desired. Next there is applied a sheet of so-called raw cushion stock 10, which covers the strips and the top face of the base, so that'the parts remain in the proper position. Partial vulcanizing of these parts provides a strong blow-out patch. l Upon the top of the cushion stock 10 .and directly above the overlapping section of cord stock 9 is placed a section ot uncured tread stock 11. Athin coating of binding cement, (not shown) may be added if desired. Patches or boots of the type herein described are generally tor emergency use, or in fixing up tires which appear to have but little remaining mileage. Notv infrequently such emergency boots or patches are inserted in a casing Without proper cleansof the surface of said casing. and in such cases the binding cementis useful. The

proper .application and operation of the blow-out patch of my invention is as follows:

A Alon1 pressure tire having a burst or blown out section is carefully scoured or cleansed on vthe inner wall adjacent the break and thepatch is positioned over the cleansed portion, `with the section of thread stock directly over the break. A tube is then inserted \in the tire, and infiated andy the tire is put into use. The patch being rigid shoulder to the roadway as the patch portion strikes the road so that there is no danger of the edge ot the patch causing bumpy traction of the tire or causing the tread offthe tire to be Worn away adjacent the lboundary of the patch. The. component parts of the patch being in a. semi raw or partially cured state, the heat due to the friction of the tire on the roadway will advance the curing of the stock and this together with the pressure of the machine upon which the tire is placed provides eiective self vulcanization of the patch to the casing. It will be apparent that there is provided the individual fibers of cord stockl running in various directions over the weakened portion of the casing and that the tread stock is forced into the breach in the tread and becomes practically vulcanized in place.

By test it has been 'found that blown out low pressure tires provided with patches of my invention will usually give a mileage of approximately one-thousand miles more than those provided with ordinary stift boots.- The reason for this hasl been touched upon above; namely, that the stiff edges ofthe normal boot or blow-out patch present av cutting edge against which the body of the casing is flexed at each revolution of the wheel and this action is destructive to the casing adjacent the boot or patch.

What I claim is: V

1. Y hoot for low pressure tires comprising a tlexible rubber base, narrow 4strips of cord stock overlapping one another over the center of the base. means for securing the strips ot cord stock in position upon the base and a section ot tread stock mounted above the overlapping portion of the strips.

2. A tire patch comprisinga rubber base, strips oi uncured cord stock overlapping one another at different angles. a sheet of cushion stock supcrposed upon the base and strips and a piece of raw tread stock surserving to retain the parts in position andA for causing them to adhere to a tire casing.

4. A patch for the breach in a tire casing' comprising a piece of tread stock for entr)7 into the breach from the inside of the tire. a piece of semi cured cushionstock adapted to-adhere to the casing wall about the tread stock. and a plurality of strips of cordl stock disposed under the cushion stock and overlapping one another beneath the piece of tread stock and retained in position against. the cushion stock by a flexible rubber base member. y

5. A flexible blowout patch. consistingr of a rubber base. cord stock arranged to pro-V vide a number of plies at the center of the base and single plies toward the edges of said base, a. piece of raw tread stock diS- posed above the multiple ply section of the u patch and means yretaining the parts inposition and serving to effect vulcanization of the parts lto one another and to a tire casing un-der heat and pressure generated by the tire in use.

6. As a new article of manufacture, a. flexible blow-out patch for .low pressure tires comprising a rubber base, raw cord stock2 and tread stock, the parts being so positioned that theV cord stock presents a single ply at the edges of the base and a plurality of plies beneath the tread stock.

As a new article of manufacture a flexible blow-out patchV for low pressure pneumatic tires comprising a `flexible rubber ase.y raw cord stock arranged in layers with t-he cords of the several layers lextending in` dilferent directions and uncured -trads'tock thel parts being so positioned as tor permit uniform free flexing of 'the patch fin' all directions about the tread stock.y

In testimony whereof. I have hereunto subscribed my name this 19th day'of July,4

CHARLES E. AYERS; 

